Bug 1406278 (CVE-2016-10010) - CVE-2016-10010 openssh: privilege escalation via Unix domain socket forwarding
Summary: CVE-2016-10010 openssh: privilege escalation via Unix domain socket forwarding
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-10010
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1406296 1410321
Blocks: 1406299 1415638
TreeView+ depends on / blocked
 
Reported: 2016-12-20 08:03 UTC by Martin Prpič
Modified: 2021-02-17 02:51 UTC (History)
7 users (show)

Fixed In Version: openssh 7.4
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Environment:
Last Closed: 2017-01-05 06:56:08 UTC
Embargoed:

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Description Martin Prpič 2016-12-20 08:03:06 UTC 
It was found that when privilege separation was disabled in OpenSSH, forwarded Unix-domain sockets would be created by sshd with root privileges instead of the privileges of the authenticated user. This could allow an authenticated attacker to potentially gain root privileges on the host system.

Note: privileges separation has been enabled by default since OpenSSH 3.3/3.3p1 (2002-06-21). Thus, OpenSSH in any version of RHEL is not affected by default. An affected OpenSSH configuration would have to specifically disable privilege separation with the "UsePrivilegeSeparation no" configuration directive in  /etc/ssh/sshd_config. More information is also available in https://access.redhat.com/solutions/1354953 .

CVE assignment:

http://seclists.org/oss-sec/2016/q4/708

Upstream patch:

http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/serverloop.c.diff?r1=1.188&r2=1.189&sortby=date&f=h
Comment 1 Martin Prpič 2016-12-20 08:03:23 UTC 
External References:

https://www.openssh.com/txt/release-7.4
Comment 2 Andrej Nemec 2016-12-20 08:41:22 UTC 
Created openssh tracking bugs for this issue:

Affects: fedora-all [bug 1406296]
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